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Maps are a language feature.

An associative array, map, symbol table, or dictionary is an abstract data type composed of a collection of (key, value) pairs, such that each possible key appears at most once in the collection.

Languages with Maps include JSON, Lua, EDN

Example from JSON:

{"name": "Mary"}

Example from Lua:

Article source

PLDB - Build the next great programming language 路 v2022 Docs Acknowledgements Email GitHub